NAIROBI, Kenya — Eight Kenyan police officers were killed when their vehicles ran over improvised bombs in two separate incidents near the border with Somalia, officials said Wednesday. The dead included a personal bodyguard for a local governor whose convoy was targeted.

The deaths came a day after Kenya's police chief Joseph Boinnet announced that al-Shabab extremists based in Somalia were stepping up attacks inside the country. He said al-Shabab is under pressure from African Union troops supporting Somalia's government, which recently declared a new offensive against the extremist group.

NAIROBI, Kenya (AP) — A Kenyan official says gunmen suspected to be al-Shabaab Islamic extremists have killed an administrative chief in an attack in Kenya's north that left two Kenya police reservists missing

Regional Coordinator Mohamud Saleh said Tuesday the attack took place in Omar Jillo in Mandera County Monday night.